* {
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
}

.content {
    height: 500px;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.top-nav {
    position: absolute;
    z-index: 2;
    height: 70px;
    width: 100%;
    left: 0;
    top: 0;
    background-color: rgba(255, 255, 255, .4);
}

.imgs {
    width: 100%;
    height: 100%;
    position: relative;
}

.imgs>a {
    /* display: none; */
    width: 100%;
    height: 100%;
    /* background-image: url(https://puui.qpic.cn/media_img/lena/PICgthm4a_580_1680/0); */
    background-repeat: no-repeat;
    background-position: center 0;
    /* background-color: rgb(25,117,180); */
}


.imgs>.active {
    display: block;
}

.side-bar {
    height: 430px;
    width: 350px;
    position: absolute;
    top: 70px;
    right: 0;
    /* background: black; */
    background: rgba(15, 15, 30, 0.4);
}

.side-bar>a {
    display: block;
    height: 35px;
    line-height: 35px;
    margin-left: 45px;
    color: rgba(255, 255, 255, 0.7);
}

.cnhz {
    font-size: 22px;
    margin-top: 10px;
    margin-bottom: 20px;
    font-weight: 700;
}

.cnhz::after {
    position: absolute;
    top: 55px;
    height: 1px;
    left: 10px;
    right: 10px;
    content: '';
    background: rgba(255, 255, 255, 0.1);
}

.zbtj {
    font-size: 22px;
    margin-top: 10px;
    font-weight: 700;
}

.cnhz>img,
.zbtj>img {
    margin-left: -24px;
}

.nav {
    font-size: 0;
}

.nav span {
    font-size: 16px;
}

.side-bar .active {
    font-size: 16px;
    color: #ff5c38;
    width: 300px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.active>span {
    font-size: 22px;
    font-weight: 700;
}